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High Risk L&D High Risk L&D, pg 1 of 12 Taking care of patients who have non-reasurring pattern • A non-reassuring pattern is: • no variability • less than 2 accelerations • decelerations • In antepartum setting, you are looking at variable and accelerations • Parameters for 28-32 weeks is different than 32 weeks or greater • What about in labor? • looking for late decels (these are bad) • variability is THE most important thing! • moderate variability shows the CNS is intact • absent variability is no bueno...this would be a big issue if it was moderate before and now has become absent. If pt had medication, then this may not be so much of a concern b/c the meds affects the baby. • minimal may be bad (probably is) • marked is also not good • Category 1: has variablity, maybe a random decel (but most likely none), has accelerations • Category 2: starting to get into a little gray area; physician can proceed forward with usual plan of care; moderate or minimal variability; may have recurring decels (of any type); • Category3 : absent or minimal variability with repetitive late decels; baby is not coping • What’s the first thing you would do if pt had repetitive variable decels? • reposition, increase IV, put Oxygen on mom, call doc (You will reposition b/c the variable decels are d/t cord compression). • You would give O2 if she had decreased variability (according to Dr. Ferguson) • Baby can get late decels from mom lying on her back (so position change), or from having low BP (so give IV bolus). Things you need for precipitous birth • IV • Oxygen • BOA kit (Birth on Arrival kit) What kind of risks are involved with precipitous birth? • Tearing at perineum • Hemorrhage d/t lacerations and such • Pneumothorax (not in boook!). This can happen to baby when he takes his first breath. • Low APGAR scores • Meconium aspiration • Brachial palsy What is considered a post-date birth? 42 weeks… • These women will get misoprostal or pitocin induction (make sure contractions aren’t too close together, monitor for fetal distress; mom will need an epidural b/c pitocin hurts; potential post-delivery problems for baby r/t epidural; hemorrhage can happen PP b/c sites are saturated with pitocin already and mom isn’t going to contract very well; non-reassuring patterns b/c BOW broken causes temps to go up, resting tone too high and contractions too close together can cause fetal distress; • High-Dose and Low-Dose Pitocin • Start out at around 4, and go up in “jumps” to get woman in labor...or can go up gradually I guess? See book. Basically RNs utilize a protocol for this, but the idea is to start low and titrate accordingly. • Baby is most likely going to be large with post-date moms • Shoulder dystocia, brachial palsy (whatever it’s called) • May have amniotomy (infection) • C/S...and all the complications • Maternal anxiety High Risk L&D, pg 2 of 12 See book for shoulder presentations and such...she says the book does a good job on this. Twin presentation • One can be vertex and the other can be breech • What they can do for the breech twin is do an internal rotation of the baby. This is usually the 2nd baby. Macrosomia (> 4500 grams) • Shoulder dystocia • hemorrhage • Don’t know if pelvis is adequate, mom may need C/S • McRobert’s maneuver if head comes out and shoulder doesn’t. • Pull mom’s legs back to open pelvis more, this can help get baby out; also put pressure above pubic bone to dislodge the shoulder (but can break the clavicle) • U/S is not reliable in establishing fetal weight Amniotic Fluid Embolus • pretty rare, but mortality rate is very high (61-81%) • mom gets amniotic fluid from baby that has crossed over into maternal circulation • Causes circulatory collapse and system-wide problems that go into DIC • Occurrence = 1:20,000 to 1:30,000 live births • Moms usually end up going to ICU, will probably be on vent • Teach mom to tell you if she has any difficulty breathing...this is serious! Hydramnios (fluid > 2000 ml) • May be related to congenital abnormalities • Diabetes mom if BS is out of control; baby pees a lot b/c there is too much glucose • Twins can have this also • Can be chronic or acute (20-24 weeks) • Mom may have difficulty breathing d/t big uterus; may remove some of the fluid • Big issue in labor is that baby is floating around a lot and don’t engage real well. If baby doesn’t engage, then can have cord prolapse when BOW ruptures. Olligohydramnios (fluid < 500 ml) • Cause unknown • Seen in post-maturity and IUGR (IUGR is usually r/t malformation in placenta, can be r/t PIH and placenta not getting good blood flow, so smoking can cause this also; two types of IUGR...assymetrical and symmetrical. Symmetrical means baby is small but proportionate (< 10% in growth); with assymetrical, the head is bigger than the abdomen and femur length...baby looks really skinny like a little old man; with IUGR the blood is spared for the most important organs (brain, heart, adrenal glands)...so abdomen is not going to get bigger but head is! Kidneys aren’t getting enough blood so the kidneys aren’t making enough urine which leads to oligohydramnios. • If mom is post-date: will be induced • Mom will have variables (decelerations) b/c she doesn’t have a lot of extra fluids so the vein is compressed. • May get amnioinfusion to get some of the pressure off the cord • If mom is 28 weeks, she will be monitored via antepartum testing (fluid tested weekly or biweekly), NST, maybe biophysical profile. The lecture based on the PPT started after she went through all this stuff...see following pages... High Risk L&D, pg 3 of 12 Analgesic Agents • Administration- based on • woman’s request • established labor pattern • baseline assessment of mom & baby • progress of labor • Types • Sedatives: barbituates (Seconal, Ambien); benzos (valium, versed) flumazenil is benzo reversal agent; H-1 Receptor antagonists (Phenergan, Vistaril, Benadryl); Narcotics (Stadol, Nubain, Demerol); Narcan is reversal for opioids • Narcotic (Stadol, Nubain, Demoral...IV administration preferred, may precipitate drug withdrawal) • H1-Receptor agonists: Phenergen, Vistaril, Benadryl • Nursing Management • Determine Stage of Labor • Evaluate contraction frequency, duration, & intensity, • Established fetal well being • Desired effect & side effects • Safe form of transportation • Red Flags – Multipara greater than 8 cm, Advanced dilation primipara Regional Anesthesia • Temporary and reversible loss of sensation • Types • Lumbar epidural – Uterus, Cervix, Vagina, & Perineum • Pudendal – Perineum & lower Vagina- Given in Second Stage, just before birth • Local infiltration –Perineum Given just before birth • Spinal – Uterus, Cervix, Vagina, & Perineum • Risk- less than general anesthesia – produced by injecting anesthetic into specific area-agent direct contact with nervous tissue Lumbar Epidural • Administration • Injection of local anesthetic agent into epidural space • Continuous block • Block continuous – usually administered during active labor, 85% achieve complete relief, 15% partial, & 3% no relief • Advantages & Disadvantages • Advantages: Adequate pain relief, Woman fully awake during labor and birth process, Allows for internal rotation, Adjusted to allow for laboring down • Disadvantages: Hypotension, Severe Complications -Postdural puncture, seizure, meningitis, cardio- respiratory arrest, vertigo • Problems- Major problem Hypotension, Inadequate block-One sided block, Pruritus, Break through pain, Maternal temperature • Headaches, migraine headaches, neckaches, & tingling of the hands and fingers (Cunningham et al., 2005), Systemic toxic reaction • Redflags- drop in maternal blood pressure, fetal deceleration, respiratory depression, post delivery headache- worse with ambulation • Contraindications • Local or systemic infection • Coagulation disorder or low PLT count • Anticipated maternal hemorrhage • Abuptio placentae, Placenta previa • Allergy to a specific class of local anesthetics High Risk L&D, pg 4 of 12 • Women with heart failure or aortic stenosis Spinal Block • Local anesthetic into spinal fluid (subarachnoid space) • Injected directly into the spinal fluid • Failure rate is low • Allows the drug to immediately mix with cerebrospinal fluid • Eliminates window (whatever that means). Usually used for operative delivery (C/S) • Advantages & Disadvantages • Advantages: immediate onset, smaller drug volume, relative ease of administration • Disadvantages: intense blockade of sympathetic fibers, greater potential for fetal hypoxia, uterine tone is maintained, short acting so difficult to maintain • Complications • Hypotension (prehydrate 500-2000 ml) • Ephedrine drug reaction- total spinal neurological sequelae (not sure what this means) • Anesthesia occurs at C3-C5 level • Respiratory function impaired • Spinal headache in 1-3% • Lasts up to 7 days • Blood patch performed, helps spinal headache Pudendal Block • Perineal anesthesia for second stage labor, birth & episiotomy repair; injected below pudendal plexus • Advantages & Disadvantages • Adv: ease of administration, absence of hypoT, allows use of vacuum or low forceps delivery • Dis: urge to bear down may be decreased; burning sensation when block administered Local Infiltration • Intracutaneous, subcutaneous, & intramuscular • Injected into the perineum • Advantages & Disadvantages • Adv: least amount of anesthetic agent used; done just prior to birth • Dis: large amounts of solution used; burning sensation at time of injection General Anesthesia • Methods Used • IV Injection • Pentothal –short acting Narcosis
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